Carbureter.



H. A. MILLER.

GABBURETER.

APPLICATION FILED 00T.19, 1910.

Patented Aug. 20, 1912.

2 SBEETSSHEET 1.

H. A. MILLER.

OARBURETER.

APPLIOATION FILED 00119, 1910.

Patented Aug. 20, 1912.

2 SHEETS-SHEET 2.

fnverziors a citizen Y power required, and'to obviate this more with heavy air at a-low altitude, or air contaming considerable moisture, it has been UNITED, sTArEs PATENT OFFICE.

\ Bias-er a. MILLBB, or nos ANGELES, CALIFORNIA.

CARB UBETER.

,oassei.

To all whom it may concern: I

Be it known that I,'-TIARRY A... MILLER, a of the United States, residing at Los Angeies, in the county of Los Angeles and State of California, have invented a new and useful Qitrbureter. of which the following is a specification.

This invention relates to carburetors. and one of the main otfj'e'cts of the invention is-to provide a central 'upwardly moving column of normal air saturated with gasolene and to introduce the auxili ya air in aradial directionfromjfall sides toward the center to mix with upwardly moving mixture of normal air and gasolene A further object is to provide for regulating the admissmn of auxiliary air, whereby the suction on the gasolene nozzle may be in- I creased o'r diminished, as desired, toproduce'the required richness ofmixture. Thus found that the normal quantity of air of this quality will pick up more gasolene than with normal air of alighter or drier quality,

king the mixture unduly rich for the auxiliary air may be admitted which will reduce suction on thegasole'ne nozzle-and thereby reduce the richness of the mixture. Or when the automobile is being operated through the medium of gears, which increases the motor speedlwith respect to the normal ratio of gearing at which 'itoperates, this increased engine speed will produce an extra amountof suction on the nozzle, thereby drawing an undue amount of gasolene for the power required, in which event the carburetor may be adjusted to increase the amount of auxiliary air, thereby reducing the suction at the nozzle and diminishing the amount of gaeclene drawn into the mixture. By reason of the auxiliary air being introduced at all points circumferentially of the central column of normal air and gasolene, the mixture of auxil' iary air with normal air and gasolene is much-more uniform.

A further object is to so construct the carburetor that the parts for regulating the auxiliary air may be applied to carburetors originally designed for a smaller intake opening, and when applied to such carbureters tl'iereby increase the capacity of such Specification of Letters Patent.

Application filed October 19, 1910. 'Serial No. 587,885.

carbureters and enable them to be employed Patented Aug. 20, 1912.

in connection with larger induct-ion pipes and larger engines without reconstructing the body portion of the carburetors.

. Another object is to deflect the entrance of the auxiliary air ata point exteriorly of the opening through which it enters, so that it will enter with less resistance and thereby a greater volume of auxiliary air may be drawn in than otherwise through a given sized opening.

Referring to the drawings :Figure 1 is a vertical sectional view through a carbureter. Fig. 2 is a sectionon line :v -w Fig. 1. Fig. 3 is a detail view showing the joint between the auxiliary air valve and its. operating connection. Fr 4 is a view similar to Fi 2, showing th auxiliary air valve in another position. Fig. 5 is a plan view of the float lever. Fig. 6 is a view of the upper portion of the carburetor, showing the automatic air valve closed, and throttle valve closed. Fig. 7 is a view similar to Fig. 6, showing the throttle valve and auxiliary air valve open, and showing a moditied form of auxiliary air valve. Fig. 8 is a vertical, sectional view on line wx Fig.l. Fig. 9 is a side elevation of what 1 is shown in Fig. l.

The. carbureter comprises an annular float chamber 1 which surrounds the main cylindrical body portion 2, and within the float chamber 1 is the float 3 which controls a forked lever 4, the latter regulating the position of an inlet valve 5 which re ulates the admission of gasolene into the' oat phamber and maintains a substantially constant level therein. I

i The needle valve 5 is loosely supported withinasleeve 6, the upper end of the needle valve 5 being pivoted at 7 to the sleeve which permits the needle valve 5 to adjust itself ,to a natural seat on the inlet valve 8. A spring 9 above the sleeve 6 serves to normally de ress the sleeve 6 and needle valve 5. A ro 10 is secured to the sleeve'fi and projects up through the spring casing 11 and a cap 12 which is screwed to the upper end of the spring casing 11. Carried on the cap 12 is a bracket 13 in which is pivoted a lever 14, the end of which is adapted to engage with a head15 on the end of the rod 10 to lift the latter when it is desired to flood the carburetor.

The lower portion of the main cylindrical body 2 is flared outwardly, as shown, and

' when the sleeve 17 is moved longitudinally.-

.On the upper end of the nozzle 19 is a cup umount of suction thus produced being which lies under the end of't-he rod 23, and screwed in the other end is a thumb screw 'the nozzle. This adjustment of the ne formed within the body 2 is a carburet" chamber 16. Sliding in the cylindric s body 2 within the carbureting chamber 16 is a sleeve-17, the lower end of which is prov vided with an outwardly flared frusto-conical flange 18, which flange-acts as an air deflectorto throw the normal air which enters from the bottom toward the nozzle 19.

20, the upper rim of which is flared outwardly, as shown, so that .the air which passes up through the s ace between the sleeve 17 and nozzle 19 wi be deflected outwardly at the mouth of the nozzle 19 and. thereby form a condition of suction immediately at the mouth of the nozzle 19, the

greater than if the walls of the nozzle 19 were continued straight up at its top.

Projecting into the nozzle 19 is a needle valve 21 havin a goose'neck 22 carried by a rod 23 whic extends down through a spring casing 24 within which is a coil spring 2-5, the upper end of the coil spring being confined by the spring casin 24 and the lower end of the coil spring ing secured to rod 23, The nozzle 19 is located in the center of the carbureting chamber and the spring casin 24 is located at one side of. the nozzle an close thereto.

Projecting from the deflector 18' is a bracket 26 having an extension 27 to which is secured a roller track 28. Pivoted at 29 to the bracket 26 is a lever 30, .one end of 31 which bears against an extension 32 of a roller supporting lever 33 which is loose] pivoted at 29 and-carries a roller 34 whic l is adapted to ride along the flat spring 28 A thumb screw 35 extends through the that spring 28 into the bracket 26 and rovides means for adjusting the position 0 the flat spring 28. Itis obvious that if the thumb screw 31 be moved in, the upper end of the lever 30 will be moved outwardly as the roller 34 bears against the spring 28, the latter resisting inward movement of the roller 34, and as the lever 30'is thus adusted the lower end thereof will act to li rod 23, thereby moving the needle valve 21 in position to allow 'more gasolene to flow throu lh t valve 21 is independent of the longitudinal position of the sleeve 17 and deflectorl8, and the latter may be moved and adjusted u or down as desired without interfering 1 with the adjustment of the needle valve 21, l as during such movement the flat sprmg 28 rides along the roller 34 but always maintainsthe roller 34 and levers 33 and 30 in position.

The sleeve 17 is connected toa rod 36 which extends up through the carbureting chamber 16 and is pivotallyconnecfled to a yoke 37 which is attached to aninner auxiliary air valve 38 which is slidabl arranged in an extension sleeve 39, the latter havin auxiliary air orts 40 which are eegmenta 'and arranged circumferentially 1n the .wall of the extension 89, andports 40 may be opened or closed by moving the inner .auxihary air valve 38 up or down, the

latter being opefated by a link 41 which is ;-7k

connected to the yoke 37 and to a throttle valve 427 When the throttle valve 42 is closed, as shown in Fig. 6, the inner auxiliary air valve 38 closes the auxiliary air ports 40, 'while when the throttle valve 42-is 86 opened, as shown in Fig. 1, theinner auxiliary air valve 38 opens the ports 40 and obviously intermediate positions of the throttlewill produce correspondingly interl mediate. positions of the inner auxiliary air it valve38i v Externally of the extension 39 is an outer auxiliary air valve 43 havin ports 44 and formed with a belhsha ange 45 which serves to deflect or i e the air upwardly 94) and inwardly throng the ports 44 and40 to cause the enterin air to promote the en, trance of air at this point and also serves as .l a handheld to enable the outer auxiliary air valve to be easily turned to adjust the width ill of the ports 40. The up er edge of the outer auxiliary air valve 43 ta esa ainst the flange '46 on the extension '39, and t e lower edge is:

- of the main body 2, and when thus applied" the opening 48 throu h which the mixture is discharged into t e induction pipe infirm larger than the opening from the carbureting chamber 16. i.

' If it is desired'to operate the motor with a rich mixture, the outer auxiliary ail" valve 45 may be closed as much as necessa which ill will restrict the entrance of the aux' iary air and will thereby increase the amount of suction at the nozzle, thus making the mixture rich, while by opening the outer auxiliary air valve 11 renter amount of auxiliary air 11- will he admitted and the suction at the nozzle will be reduced and the mixture will be less riti.

In Fig. 7, i9 is an independent, inner, aux- I iliary air-valve which lies below the valve 38 and comprises merely a circular band with a pin 50 extending through a diagonal slot 51 formed in the wall 39, whereby, u on. turning pin 50. the valve 49 will be raise ,or lowered. according to the direction in which 1 it is turned and will thereby alter the size of the ports 40, the .valve 49 corresponding to the valve 45, but acting to restrict the "ports 40 in height instead of in breadth a8 accomplished by valve 45,

52 is-a ball and socketconnection on the valve 45. enabling the latter to be operated from a distant point if desired.

That I claim is 1. A carbureter comprising a mixing chamber the lower endof which constitutes a carbureting chamber, a fuel nozzle, a pri mary air inlet discharge into the carlun'etim chamber, the side walls of the mixing chamher having an annular port therein above the nozzle, a, sliding'sleeve within the mixing chamber and adapted to cover said ports, a, throttle valve and a. connection from the throttle valve to said sliding sleeve for causing the sleeve to be adjusted into a position corresponding to the position in which the throttle valve is adjusted, a sleeve below the first sleeve and having an outwardly flaring lower encl'for deflecting air toward the nozzle and a connection between the first sleeve and secondsleeve for sliding the first sleeve in unison with thetsecond sleeve.

2. A carbureter comprising a mixing chamber the lower end of which constitutes a. carhureting chamber, a fuel nozzle, a pri ing chamber and adapted to cover said ports,

a throttle-valve and a connection from the throttle valve to said sliding sleeve for cansing the slt eve to be adjusted into a position corresponding to the position in which the throttle valve is adjusted, a sleeve below the first sleeve and having an outwardly flaring, lower end for deflecting air toward the nozzle, and a connection between the first sleeve and second sleeve for sliding, the first sleeve in unison with the. second sleeve, a needle valve for eontrolling said nozzle, and means operated by said second sleeve for operating said needle valve.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 14th day of October, 1910.

HARRY A.

In presence of- G. T. l-lAcKLicY,

FRANK L. A. GRAHAM.

M ILLE R. 

